fix kitti rotation error unit

[YuePanEdward]

I found that the unit for average rotation error (kitti metric) might be wrong.
If deg/m is used for average rotation error's unit as here:

self.results.append(desc="Average Rotational Error", units="deg/m", value=avg_rot)

and according to here:

double avg_rot_error = 100.0 * (r_err / static_cast<double>(err.size())) / 3.14 * 180.0;

then the calculated value needs to be divided by 100.

[benemer]

Good catch, thanks! Indeed, the unit of the average relative rotation error is deg/m, so it does not make sense to scale it by a factor of 100.

However, instead of fixing this in the metrics.py, I think it would make more sense to correct it in the Metrics.cpp (because it's already wrong here). Could you please change it there??

[benemer]

Perfect, thanks!